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FINANCING ARRANGEMENTS - Note Hedges and Warrants (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	6 Months Ended
	May 09, 2016	Dec. 31, 2016	Jun. 30, 2018	Apr. 04, 2016
Debt Disclosure [Abstract]
Cost of convertible note hedges		$ 59.1
Number of shares available to be purchased (in shares)	2.3
Strike price (in usd per share)	$ 108.00
Cash proceeds from issuance of warrants			$ 35.5
Exercise price (in usd per share)				$ 170.00

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- Definition

Convertible Note Hedge, Strike Price

+ References

No definition available.

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- Definition

Hedging Activity, Shares Covered

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The premium (cost) of a hedge, expensed during the period.

+ References

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- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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